Honestly I wouldn’t even characterize white prison gangs as political. They intially formed for protection against other ethnic gangs (not to excuse them - they’ve become as violent and vicious as the other ethnic gangs, and in some cases, even worse.)
There’s White Supremacist rhetoric, tatoos, etc. but their primary purpose now is making money. They cooperate and collaborate with various black and hispanic gangs when they can make money of the drug trade, etc.
Even Timothy Leary was threatened in prison by minorities when he was locked up. He decided to get them to write a newspaper of their grievances to take their aggression out on the prison officials instead of going after him and other white prisoners who weren't the cause of their problems.